Application of Dynamic Dead Time Control in High Frequency & Voltage Power Supply

In this paper, phase-shift controlled full-bridge series resonant high frequency & voltage power is used for discharge plasma. It adds dynamic zero-voltage delay control scheme which can provide optimal turn-on delay timing regardless of input voltage, output load or component tolerances. When the expected zero voltage condition is reached, a switching transition is commanded to make converter implement ZVS on the whole condition. Practical application results indicated it can reduce power consumption and high surge voltage and current brought by inverter due to unreasonable dead time and thus improve the reliability of the power components. The efficiency and performance also increased greatly.